CVE-2019-16928 is a critical heap-based buffer overflow vulnerability in Exim versions 4.92 through 4.92.2, affecting distributions like Canonical, Debian, and Fedora. This flaw allows unauthenticated remote attackers to achieve remote code execution by sending a specially crafted, long EHLO command. With a CVSS score of 9.8, it presents a low-complexity attack vector with high impact on confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog, and has garnered significant community discussion and media coverage, despite a lack of public exploit tools like Metasploit or ExploitDB entries.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.92, <= 4.92.2CPE matchmatch criteria | cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* | ||
19.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
29CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* | ||
30CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
exim: remotely triggerable buffer overflow in string_vformat()
Sep 27, 2019Security Advisory for CVE-2019-16928
Security Advisory for CVE-2019-16928